#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <pthread.h>
#include <sched.h>
#include "Mutex.hpp"

int ticket = 0;
pthread_mutex_t mutex;
pthread_cond_t cond = PTHREAD_COND_INITIALIZER;

void *route(void *arg)
{
    char *id = (char *)arg;
    while (1)
    {
        pthread_mutex_lock(&mutex);
        if (ticket > 0)
        {
            usleep(1000);
            printf("%s sells ticket:%d\n", id, ticket);

            ticket--;
            pthread_mutex_unlock(&mutex);
        }
        else
        {
            printf("%s wait on cond\n",id);
            pthread_cond_wait(&cond,&mutex);//醒来的时候，会重新申请锁
            printf("%s 被叫醒了\n",id);
        }
        pthread_mutex_unlock(&mutex);
    }
    return nullptr;
}
int main(void)
{
    pthread_t t1, t2, t3, t4;
    pthread_mutex_init(&mutex, NULL);
    pthread_create(&t1, NULL, route, (void*)"thread 1");
    pthread_create(&t2, NULL, route, (void*)"thread 2");
    pthread_create(&t3, NULL, route, (void*)"thread 3");
    pthread_create(&t4, NULL, route, (void*)"thread 4");

    int cnt = 10;
    while(true)
    {
        sleep(5);
        ticket += cnt;
        printf("主线程放票,ticket:%d\n",ticket);
        //唤醒一个进程
        pthread_cond_signal(&cond);
    }

    pthread_join(t1, NULL);
    pthread_join(t2, NULL);
    pthread_join(t3, NULL);
    pthread_join(t4, NULL);
    pthread_mutex_destroy(&mutex);
}

// using namespace LockModule;

// int ticket = 10000;
// Mutex mtx;

// void *route(void *arg)
// {
//     char *id = (char *)arg;
//     while (true)
//     {
//         //mtx.Lock();
//         LockGuard LockGuard(mtx);//临时对象，临界区，RAII风格
//         if (ticket > 0)
//         {
//             usleep(1000);
//             printf("%s sells ticket:%d\n", id, ticket);
//             ticket--;
//             //mtx.Unlock();
//         }
//         else
//         {
//             //mtx.Unlock();
//             break;
//         }
//     }
//     return nullptr;
// }

// int main(void)
// {
//     pthread_t t1, t2, t3, t4;

//     pthread_create(&t1, NULL, route, (void *)"thread 1");
//     pthread_create(&t2, NULL, route, (void *)"thread 2");
//     pthread_create(&t3, NULL, route, (void *)"thread 3");
//     pthread_create(&t4, NULL, route, (void *)"thread 4");

//     pthread_join(t1, NULL);
//     pthread_join(t2, NULL);
//     pthread_join(t3, NULL);
//     pthread_join(t4, NULL);
// }